This set is the second instalment of an ambitious project: the recording of the complete codex of Las Huelgas, one of the most important sources of music of the High Middle Ages, an anthology of songs from the 13th century representative of the Ars Antiqua. The manuscript was written in the Cistercian monastery of Santa María la Real de Las Huelgas in Burgos, with the authorisation of Alfonso VIII King of Castile. The manuscript contains 45 monophonic pieces (20 sequences, 5 conductus, 10 Benedicamus tropes) and 141 polyphonic compositions.